<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>双飞翼布局</title>
  <style>
     body {
      min-width: 500px;
    }

    #left{
      width: 200px;
      background-color: burlywood;
      margin-left: -100%;
      height: 200px;
    }
    /* 让自身向左移动200px 到上边的位置 */
    #right{
      width: 200px;
      height: 200px;
      background-color: red;
      margin-left: -200px;
    }

    #main{
      width: 100%;
      height: 200px;
      background-color: #ccc;
    }

    /* 给左右两边留白200px */
    #main-wrap{
      margin: 0 200px 0 200px;
      background-color: aqua;
    }
    .column{
      float: left;
    }

  </style>
</head>
<body>
  <div id="main" class="column">
    <div id="main-wrap">main</div>
  </div>
  <div id="left" class="column">left</div>
  <div id="right" class="column">right</div>
</body>
</html>